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Black H4/9003 bi-xenon relay harness with plug connectors and wiring, 1.0 in height, 5.00 ounces

XtremeVision

XtremeVision H4/9003 Bi-Xenon Relay Harness H4-HARNESS-4-XT

SKU CH-NNXW-8ERXF

Plug-and-play relay harness powers 35 W or 55 W dual-beam HID bulbs from the battery for flicker-free high/low switching

  • Height1.0 in
  • Weight5.00 ounces
  • Designed for dual-beam HID bulbs with high/low switching
  • Plug-and-play installation draws power directly from the battery
  • Compatible with 35 W HID kits only, not 55 W
  • Single harness operates both driver and passenger headlights
  • Lightweight 5.00 oz relay harness fits H4/9003 sockets

H4/9003 Bi-Xenon Relay Harness

The XtremeVision H4-HARNESS-4-XT connects between the vehicle battery and dual-beam HID bulbs to supply steady power for reliable high and low beam switching. It is built for owners fitting 35W HID conversion kits who want a direct plug-and-play solution without extra wiring to the battery.

35W Kit Compatibility and Single Harness Design

The harness works only with 35W HID conversion kits and is not compatible with 55W kits. One unit serves both driver and passenger side headlights, drawing power straight from the battery to stop bulb flicker while keeping installation at the OEM socket.

Fiberglass Construction with Compact Dimensions

The harness uses fiberglass material and measures 1.0 inch in height with a package size of 8.8 by 24.4 centimeters, weighing 5.00 ounces. Buyers needing a harness for 55W kits or single-beam bulbs should look elsewhere.

Highlights

  • Designed for dual-beam HID bulbs with high/low switching
  • Plug-and-play installation draws power directly from the battery
  • Compatible with 35 W HID kits only, not 55 W
  • Single harness operates both driver and passenger headlights
  • Lightweight 5.00 oz relay harness fits H4/9003 sockets

Specifications

BrandXtremeVision
ModelH4-HARNESS-4-XT
Height1.0 in
Weight5.00 ounces

Questions about this item

Will the relay or wiring need replacement if I later upgrade to a 55W HID kit?

The harness is compatible only with 35W HID conversion kits; using a 55W kit exceeds its design and would require a different harness.

What is the first limit reached during extended high-beam use?

The relay is rated for 35W dual-beam HID bulbs; sustained operation above that wattage is the limiting factor.

How much heat does the harness generate when the headlights run all day?

The unit weighs 5.00 ounces and uses a fiberglass housing, so heat output remains low during continuous operation.

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